<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>

		<style type="text/css">
			.parent {
				border: solid #AAAAAA;
				width: 10em;
				height: 10em;
			}

			.lf {
				float: left;
			}

			.rf {
				float: right;
			}

			.lf,
			.rf {
				width: 2em;
				height: 2em;
				background: #000000;

			}
		</style>
	</head>
	<body>

		<div class="parent">
			<div class="lf"></div>
			<div class="rf"></div>
		</div>
	</body>
</html>
